Calculator for type-writing machines.



PATENTED NOV. 19, 1907.

E.- V. WILLIAMS.

CALCULATOR FOR TYPE WRITING MACHINES.

APPLICATION FILED FEB. 20, 1906.

"I SHEETS-SHEET 1 Inn- PATENTED NOV. 19, 1907.

E. V. WILLIAMS. CALCULATOR FOR TYPE WRITING MACHINES.

APPLICATION FILED FEB. 20, 1906.

7 SHEETBSHEHT 8.

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attouwq No. 871,311. v PATENTED 110V. 19, 1907. E. v. WILLIAMS.

CALCULATOR FOR TYPE WRITING MACHINES.

APPLIOATIOH rum: r212. 20, 10011.

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vL"linerEli 1111211118 PATENTED NOV. 19, 1907. E. V. WILLIAMS. CALCULATOR FOR TYPE WRITING MACHINES.

uruonml nun r111; 20. 1900 No. 871,311. I PATENTED NOV. 19, 1907. E. V. WILLIAMS.

CALCULATOR FOR TYPE WRITING MACHINES.

APPLICATION FILED FEB. 20, 1906.

'! SHEBTS-8HBET 0.

IlmerIfM illmm' s 1 L r Q No. 871,311. PATENTED NOV. 19, 1907.

I B. V. WILLIAMS. CALCULATOR FOR TYPE WRITING MACHINES.

APPLIOATIOI FILED FEB. 20, 19,06.

7 SHEETS-SHEET 'I.

animator '1' lmerl. Wdlrkuns UNITED STATES PATENT OFFICE.

ELMER V. WILLIAMS, OF SAN PEDRO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO LUKE KELLY, OF SAN PEDRO, CALIFORNIA.

Specification of Letters Patent.

Patented Nov. 19, 1907.

Application filed February 20,1906- Serial No. 802,121.

To all whom it may concern:

Be it known that I, ELMER- V. WILLIAMS, of San Pedro, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Calculators for Type-Writin 'Machines; and I do hereby declare the following to be a full, clear, and exactdescri tion of the invention, such as will enable ot ers skilled in the art to which it appertains to make and use the same.

The primar object of this invention isto provide a ca culator capable of being attached to standard makes of typewriters and by which addition or subtraction may be worked either in vertical lines or in horizontal lines. And further objects are to provide an attachment of this kind which will not interfere with the ordinary work of the typewriting machine; which will require but little, if any, additional pressure in the operation-of the keys; and which will also permit of the use, when desired, of the numeral keys of the typewriter without actuating the calculator.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in perspective of a typewriting machine equip ed with my I improvements.

Fig. 2 is a s1 e elevation of one ofthe calculators, with its side plate removed. Fig. 3

is an enlarged view showing the connection between a calculator arm and the typewriter carriage. Fig. 4 is a view of some 'of the gear-wheels of the calculator, the escapement pawls and the tri ping arm. Fi 5 is a detached view of the igit wheels an their shifting means. the digit wheels. Fig. 7 is a detail. Fi 8 is a face view'of the digit shifting arm. Fig.

. 9 is'a side view of a portion of the gearing of is a detached view thereof. Fig. 14 is a plan.

view, Fig. 15 a front elevation and Fig. 16 an end view of a modified form of operating the calculator. 17 shows one of the.

Fig. 6 shows the shaft ofescapement pawls. Fig. 18 shows edge views of two intermeshing wheels and t e shiftable wheels for engaging therewith.

Referring to the drawings, 1 designates, in general outline, the frame of a t writer of the Remington style. To one side of this frame is secured a triangular frame 2 composed of an upper guide rod and two lower uide rods against and upon which move rol ers 3 on the outside of a calculator4. This calculator is connected by an arm 5 to the traveling carria e of the typewriter so as to move back and orth on frame 2 in unison with the movements ofthe carriage. The connection of this arm to the carriage is djustable so that the position of the calcu ator relative to the latter may be readily changed. This is effected by screws 5' passed through slots 5". Arm 5 is shown as etjluip ed in its upper face with grooves 6 wit w ich engages a screw 7 mounted in a bracket 7 on the calculator casing. Hence while the arm may be moved independently of the carriage, the calculator may be adjusted on the arm.

8 desi nates what I term the controller shaft. t is normally held locked, and its release is necessary in order to allow of the operation of an one of the several trains of gearing of t e calculator. This shaft is mounted horizontally in the frame of the typewriter, and carries a gear-wheel-Q which is shown in Fi 1 as beingat its outer end. Also on this s aft is asmall gear-wheel 10 just inside one of the end uprights of the typewriter frame, and when the calculator is not to be actuated this gear wheel is engaged by a spring-held pawl 12, which looks the shaft 8. But when the calculator is in use, pawl 12 is turned to one side a ainst a sto 13, as shown in Fig. 12, being, eld in bot positions by the, same sprin This gearwheel'is also engaged by a paw 14 extending from a rock shaft 15. located above .and parallel with shaft 8. The partial rotation of shaft 15 will raise pawl 14 out ofenga ement with wheel 10 as against the tension 0 spring 16. This will occur each time one of the numeral keys is depressed, but if wheel 10 be also engaged by pawl 12 such movement of the numeral key, although it will raise pawl 15, will not ermit shaft 8 to rotate. Otherwise, if paw 12 be out of engagement, shaft 8 will be free to revolve when pawl 15 is actuated. From this shaft 15 project a series of at 18 and as havingsecured thereto near its front enda vertically disposed rod 19 from the upper end of which projects a lateral lug- 20 designed to engage one of the arms 17 when the key is depressed. Each rod 19 is passed through a'guide loop 21. Immediatelyadjacent these rods 19 are verticallydisposed pivoted arms 22 mounted on a cross rod 23 having its bearings in the typewriter frame. Each of these arms has a front bulged portion 24 which is normally held against rod 19 by a spring 25, secured to a cross rod 26, mounted similarly to rod 23. The vertical rods 19, immediately above these bulged portions of arms 22, are bent to form angular shoulders 27- which are designed to bear inwardly on such bulged 'por-' tions when the numeral keys are depressed. In this way, the arms 22 are caused to partlyturn on their pivots as against the tensions of springs 25-. When the arms are so turned segmental toothed wheels 28 mounted on the upper ends of such arms are caused to engage gear-wheels 29 fast on shaft 8, there being one gear wheel 1 corresponding to each seg- {pental wheel and hence to the nine numeral Each of the wheels 28 carries a' different number of'gear teeth, corresponding to the numeral of itsrespective key, and it also has an elongated tooth 30, which I denominate a stop tooth, since when it contacts with the respective wheel 29 the revolution of shaft 8 is arrested. Each of the wheels 28 is returned to its normal positionbya coil spring 31 (see Fig. 11) asv soon 'as pressure 18 re leased from the type key and the wheel-carrying arm 22'resumes its normal position under the action ofiits spring'25. A stop lug 32 projecting from each arm in the plane of a shoulder of each wheel 28 arrests the movement of the latter-under the recoil of its spring. Atthe same time that one of the wheels 28 is thrown into engagement with its respective wheel 29, the lug 17 of the depressed rod 19 by acting on the respective arm17 turns shaft 15 sufficiently to raise the holding pawl .14 out of engagement with wheel 10, and the pawl 12 being previously thrown out of enga ement, the controller shaft 8 is released am is free to revolve with the gearingof the calculator, the latter as well as the shaft being arrested only when. the stop tooth 30 of the actuated wheel 28 engages the respective gear wheel 29. When the revolution of the controller shaft ceases, and pressure on the numeral key is released, the pawl 14 drops back into engagement with gear wheel 10, and holds. the mechanism ready for the next operation.

The calculator 4.1nav be of anydesired ca- In Fig; 1.1, 1 have shown one of these keys with a gear-wheel 41.

pacity, but, for. all ordinary purposes, onehaving nine or ten sets of digitwheels and v trains of gearing is suflicient.

stated, each digit wheel has its own separate train of spring-actuated gearing, the several spring motors being wound from a common.

point. The release. of the train of gearing of 7 anyone of the digit wheels is dependent upon, fi1'st,the tripping ofan escapement, and, secondly, the release of the controller shaft 8, the gear of which is at the same time in mesh-with one of the wheels of such train,

simultaneousjwith the releaseof such shaft,

by the disengagement of pawl 14 from wheel 10, the train of gearing with which the gearwheel 9 is in engagement. is free to be actuated by its respective spring motor, the arrest thereof being effected simultaneously with the arrest of shaft 8. The calculator being adjusted in proper relation to the carriage of the typewriter, according to the point at which the first number is to be printed, the calculator as it moveson frame 2 will, at the proper point, extend over the end of shaft 8, and the wheel 9 thereofwill be in line to be engaged by one wheel of each train of gearing. This will be better understood by reference to Fig. 2, which shows a single train of gearing of a single column. This, together with others of substantially identical construction, makes .up the entire gear mechanism of the calculator. Each train is driven by its own s )ring motor 33,- the spring whereof is preferah type. The springs of theseveral motors will be wound .by a sin le winding device 34. Some of the teeth 0 the gear wheels 35 of 1y of the barrel each motor{ are omitted, as at 36, so as to make it possible for the one winding device to l wind the springs of all the trains of gearing equally and?together,and'without danger of injury to those whose springs'have not been unwound to the same extent as have the springs of other trains. To economize in space the several spring motors are arranged in staggered relation to one another, that of a second train of gearing being indicated at 37 Fig.

- '38, 38 and 39' are intermediate gears actu- I ated by a spring motor. The gear 39 meshes with a gear-wheel 40, which in turn meshes It is with wheel 40- that the gear 9 of controller shaft 8 intermeshes, that is to say, the gear-Wheel 40 of each train of gearing is capable of sliding engagement with the controller gear. The gear-wheels 40-and 41 are of corresponding diameters and thickness, but are not on exactly the same plane, (see Fig; 18]) so that they do not mesh throughout their-full width. This is to enable the digit controlling Wheels 42, which are thinner, to be placed in en agement either with the wheels '40 or the wheels 41, according as the machine is set to per- I form addition or subtraction. For adding,

'levers are mounted on a cross rod 55.

wheels 42 engage with wheels 40, while for subtraction the engagement is with wheels 41.

The digit controlling wheels 42 are mounted on a longitudinally movable'shaft 43', the movements whereof effect the shifting of wheels 42 from engagement with wheels 40 to engagement with 41, or the reverse. I have shown shaft 43 as having on its projeoti end an eccentric groove 44 to receive a stiid 45 ofa concentrically mounted crank handle 46 fitted by plates 47 to one side of the calculator. Although as a matter of fact the numbers could be placed on wheels 42, et for the purpose of throwing the digits orward, nearer to the operator, I provide a sec 0nd and corresponding -set of digit wheels 48, the numbers whereon are visible through a slot 49 formed in the calculator casing. These su plementary wheels 48 are mounted on a sha 't 50 and are movable longitudinally of their axes synchronously with wheels 42,

arms 51 carried by shaft 43 being extended against the end digit wheels 48, so that the latter will travel bodily when the wheels 42 are shifted.

52 designates gear-wheels mounted above and actuated by the digit-controlling wheels 42. Each of'these wheels 52 carries a cam 53 for operating the next adjacent higher wheel once in each revolution to performthe operation of carrying, as is well known in 'the addition of numbers, and when re-,

versed, of subtraction. The cam shown in Fig. 2"is carried bythe gear wheel 52 corresponding to the one shown broken awayin such figure. Each cam is intended to operate an escapement lever 54, all of which Each lever (see Fig. 17) has near one enda pin 56 for engagement therewith of the, respective cam 53, and at its other end carries a sprin held laterally movable pawl 57, which paw s engage the respective Wheel 41 of the several trains of gearing. r I i To allow of the operation of any one train ofgearing it isnecessary that the respective awl 57 be thrown out of engagement with its gear-wheel 41. the train of gearing with the 'whee 40 of which the controller shaft gear 9 is in engagement may be released while such gear is in mesh with such wheel 40, I provide a tri in the'form of spring-held, pawl 58 exten in from a fixe'd rod 59- extending'from one em control er shaft. This'ro'd coincides with a transverse opening in the calculator casing,v and the pawl 58 is in linewith the outer short arms of pawls 57, .As the calculator traveling with. the ty ewriter carriage moves over or telescopes ro 59 and shaft 8, each of the escapement pawls 57 will successively be turned laterally out of engagement with its respective gear 4L as it engages with pawl 58,

In order that the awl of leased, so that should a numeral key be depressed while any one of the escapement' pawls is disengaged, the respective train of caring will immediately be set in operation. his is true since the controller shaft is free to revolve instantly upon the disengagement of pawl 14, the extent of such revolution being governed by the number of teeth in the gear-wheel 28. The disengagement of any one of the escapement pawls 57, although it leaves the respective train of gearing free to be operated, has no other effect thereon if a numeral key be not depressed. By reference to Fig. 4 it will be seen that as the wheels 41. move with the calculator from right to left the several escapement pawls 57 are turned laterally. As the calculator is moved in the opposite direction, however, the tripping pawl 58 is turned on its pivot as against the tension of a spring 60. See Fig-4.

So far as concerns the actuation of an adjacent train of gearing, upon the completion of revolution of any one digit wheel, it is permit'the train of which the latter forms a part to. turn sufficiently to allow the digit wheel to present the next higher orlower number, according as the machine is set for addition or subtraction. Instantly the lever 55 is freedof the actuating cam 53 the train of gearing will be arrested. by the return of pawl 57 to its normal position.

In 1 I have shown a general view of the attachment for the addition or subtraction of any number of vertical columns up to nine, the calculator being'movable with the typewriter carriage and capable of adjustment relatively thereto, the point of attachment and manner of attachment varying with different makes of typewriters. As the typewriter carriage moves from right tofleft, the calculator is brou ht across, or caused to telescope, shaft 8 and rod 59 so that" the trippin pawl 58 will engage the esc'apement paw s 57 and gear wheel 9 will engage the cars 40, or'be 1n line therewith. The control er shaft controls themovement of the spring-actuated train of gearing, and it in turn is governed by the key action.

The movement of each train of gearing is checked and controlled from two separate,

sources, first by the escapem'ent awl. 57,

and secondly by the controller wieel and shaft. In consequence, no movement of any one train of gearing is permitted by this double locking -or controlling agency except that which it is intended to permit,

and in order that the controller shaft and its wheel may assume control of m one train,

the locking pawl thereof must be disengaged at the time the controller wheel .is in mesh with the respective gear wheel 40. Hence the tripping pawl 58 is inithe same vertical plane with the controller gear. It followsthat any one train of gearing is free/to operate only when its escapement-pawl is released, and the controller shaft is free ofbers of three figures each, say, 456, 567, and

678. The calculator is adjusted relatively to'the type carriage so that the gear40 of the units column will be in mesh with the controller shaft gear9 when the pointer is at 60" on the guide scale. The hundreds column will therefore be at 58. With the pointer at 58, the operator depresses numeral key 4, thereby throwing the segmental'toothed wheel 28 into mesh with its respective gear-wheel 29, allowing the controller shaft to revolve seven-tenths of its circumference, the pawl 14 being disengaged from wheel why the depression of the type key. The controller wheel being in mesh with the" gea'rwheel 40 of the hundreds column, the hundreds digit wheel will be revolved, under the action of the sprin motor, until the stop tooth 30 engages whee '29, which in this case would be four-tenths of the circumference of "the latter. The. figure 4 would appear at the opening 49.

Thesame action takes place when keys 5 and 6* are depressed, the number 456 "appearing on the digit -wheels in the hun- 7 dreds, tens and units columns.

The'pointer being again placed at 58", (for a new line) the operator depresses type key 5; The

operation isas before, the figure "'pearing on the hundred digit. wheel K 9.17 apat the opening 49. Then the type key 6" is depressed, c aus'ingthe respective dig-it wheelto make a complete-revolution and one-tenth more. "This latter fractional. movement I opening 49, 0. or zero appears.

through cam 53 and lever 54 of the hun-,

dreds column allows the hundreds digit wheel to advance one-tenth, so that instead of 9 of the hundreds column appearing at As the several trains of gearing and escap'ements are identical, .carrying will ,likewlse. take thousands column. 6(1.

place between hundreds andv thousands,

' and soon, and in consequence, simultane- 'ously with the appearance of "O 1n the hundreds column, 1 will appear inthe place when numeral key 7, is depressed; and also when anew line is taken and the final number 678 is written. When all of these numbers are printed, one below the other, the sum total will appear at opening 49 on the circumferences of four digit controller shaft .8, such gearwheel A similar action takes.

wheels. Before the operator prints this sum total below the three sets of figures, he turns the crank 46' axially so as to shift the digit controlling wheels 42 out ofengagement with gear wheels 40 and into'engagement with wheels 41, in order that the digit wheels of the calculator may be returned to zero ready for further use. Thereupon, when theo erator depresses type key -1 (the contro ler wheel being in mesh with wheel 40 of the thousands column and the pointerat 57- on the guide scale) 1000 'is subtracted from the number written. The

key 7 i s'then depressed and 700 is sub tracted, -O appearing on the digit wheel ofthe hundreds'column. Type key 0 is then depressed, and not being geared with the calculator the latter is in no way affected, and hence 0 of the tens column remains as before. is depressed, and in consequence all the Finally type .key

digit wheels of the calculator read zero.

In Fig. 13 I have shown my invention as employed for cross addition or cross subtraction. This calls for the employment of a plurality of calculators and an increase in the number of gear-wheels on the controller shaft, which latter of course has to be lengthened, ashas also the frame 2 u on which the calculators travel back andorth with the movements of the typewriter carriage. In this fi ure I have shown three calculators A, B, an 0, located in close relation to each other, .and a gear wheel 9 on the elon ated designed to intermesh with gear wheels 0 the three calculators A, B, and C, corre sponding to the gear-wheels 40, before described. I have also shown afourth calculator Dlocated some distance to the right of the' three calculators and movable con-'- jointly therewith, all being joined by a common bar 61. This fourthcalculator is in- .tendedto move across any one of three smaller gear wheels 9*, 9, or 9 on controller shaft 8. When anyone of the gear Wheels 40-of calculator A is'in mesh'with gear Wheel ,9, similar ear-wheels of calculator D .are in mesh wit gear wheel 9*, while when cal- .culator B is moved over gear wheel 9*, calculator D is over gear-wheel 9; The same ,is also true with respect to calculator'C and gear-wheel 9' on the one hand, and calculator Dfand gear-wheel 9 on the other hand. When calculator A' is in operation under the control of gear-.wheel- 9, the same result will' appear on the digit wheels of the calculator D as is indicated by the digit wheels of calculator, A; then as the carriage is I moved to the left, and calculator B is brought into 0 erative 'relationwith controller wheel awn calculator l). into operative relation with gear-wheel 9, the digit wheels of calculator D are reversed (ifcross subtraction is' being worked) .by the-shifting of such digit wheels in the manner hereinhefore recited.

In consequence, the digit wheels of calcu- Hence the difference between the sums l of the digit wheels of calculators A and B V will be indicated by the di 't wheels of calculator D. -When this di erence is rinted by the typewriter, calculator C wil be in.

operative relationwith controller wheel 9, andwalculator" D in 0 eration with controller wheel 9. I The igit wheels of calculator D being still in subtraction will be returned to zero and the device ready for a new operation. B way of illustration it may be said that tile sum indicated by calculator A would show the gross or minuend; that indicated by calculator B would show the tare or subtrahend;' and that indicated by calculator 0 would show the net or remainder; while the digits of calculator D will be at zero. As far as this use of my invention is concerned, the only operation required on the art of the operator aside from the manipu ation of the t ewriter, is the setting of the digit wheels 0 calculator D for subtraction after the calculator A has ,performed its work. Although the digit wheels of the calculator'D, in cross subtraction, are returned to zero as the difference between the sums of the calculators A and B is being written (at which time the calculator is in operative relation with gear-wheel 9) the calculations worked out by the three calculators A, B and C, res ectivel are increased as each additional ine of ii es is written, so that the sums total of t e calculators A, B and C, may be printed at the foot of each column. Whenthis is being done the digit wheels of each of the three calculators are reversed for subtraction so that as the sums total are written they will be returned to zero. In this connection it will also be understood that in rinting numbers that are not to be recorded by the calculators it is only neces sary for the operator to throw the locking pawl 12 into engagement with wheel 10 o the controller shaft, thereb preventing the operation of the latter as the type keys are depressed.

An illustration of cross subtraction follows:-.

The figures a pearing in the first column under the hea ing Car No. will not be recorded since calculator A has not yet been thrown into engagement with the controller shaft. In the printing of the numbers of this is shown in Figs. 14, 15 and 16.

the Gross column the pawl 12 isthrown back against stop 13, and before printing the numbers in the column Tare the di it wheels of the calculator D are shifted or subtraction, and are returned to zero as the remainder indicated thereby is being printed while calculator C is in operative relation with the controller shaft. The operation of writing the gross and tarein each column produces the net, and the writing of the several columns produces the total addition.

Although I have described the series of calculators as being employed for cross subtraction, it will be understood that in working cross addition the only difference in the operation lies in the fact that the digit-controlling wheels of calculator D remain in mesh with the respective until the sum of the cross a dition is about to be registered b calculator C, whereupon.

with the carriage continuously, it may be.

arranged to move only during a portion of such travel. Its motion relative to that of the carriage may also be twofold, so as to allow of greater space between the several trains of gearing of the calculator. Al lnpf e bar 62 is straight andfrom it depends an arm 63 carrying a horizontally-disposed rack-bar 64,, said arm bein adjustable by a screw 65. The calculator as a rack-bar 66 with which meshes a gear-wheel 67 on'a shaft 68 havi its bearings in brackets 69.

On the rear en of this shaft is a gear-wheel 70 ofone-half the diameter of the gear-Wheel 67. When wheel 70 is engaged and turned by therack-bar 64, traveling with the carriage, the movement of such wheel will,

through the larger wheel 67, impart a multiplying movement to the calculator. The gear-wheel 67 is always in'mesh with the rack-bar of the calculator, but the smaller gear-wheelis en aged'by the traveling rackar only at ora out the time the calculator is to be set in operation.

The advantages of my invent1on are apparent to those skilled in the art. It 1s maniest that the same may be applied to various standard makes of typewriting machines, and that by means thereof the adding and subtraction of numbers may be quickly and accurately accomplished, either as regards vertical columns. or sums horizontally arranged. I 1

. It is obvious that changes may be made in ear wheels" 40 the details ofconstruction without departing I the typewriter for releasing the controller from the spirit or scope of my invention.

' I claim as m invention:-

.1. The com ination with a typewriting machine, having a traveling carriage, of a .frame and a travelin calculator,-actuating means for the calcu ator carried thereby; means for normally restraining such actuat- 'ing'means means fixedly'mounted relative tov the frame 6% the typewriting machine for releasing such restraining means when the cal- 7 culator is'brought into proper relation thereto, and means actuated by depressing any numeral key of the typewriter for controlling the extent of operation of the calcu-- ator;

2. The combination with atypewriting machine, having 'a-traveling carriage, of a frame and a traveling calculator, springimpelled actuating means for the calculator,

as'against such actuating means, means having-a fixed relation to the typewriter frame for releasin such holding means, means also having a Xedrelationto the t and means actuated by'any numeral key of the typewriter for 'permittin such latter means to cooperate "with t e calculator carriage, of a calculator movable with said carriage, spring-impelled actuating means for the calculator. means forholding the'calculator mechan sm as against such actuating means, means having a fixed relation to the I typewriter frame for releasing such holding means, means also having fixed relation to' the ty ewriter frame for cooperating-with the ca culator, means actuated by the nu:

inieral keys of the typewriter for permitting such latter means to cooperate withv thecalcula'tor. while the holding mcansi's released, and means for limiting such cooperation,

" such latter ineans being different for each numeral key of the typewriter.

The combination with a typewriting machine having a frame and. a traveling carriage, of a calculator, movable'withsaid carriage,- having several separate digit wheels and-separate trains-of actuating gearing'for each digit wheel, escapement means nor 'mally'restraining each train, means having fixed relation to the typewriter-frame for releasing such escapement means, a controller s aft mounted on the typewriter-having a gear-wheel in line with such releasingmeans, said gear-wheel beiii ii sliding en gag'ement with a boriespoming gear-wheel of each train of gearing," means normally holdingsuch-controller shaft to prevent the rotationof anytrain of gearing Whose'es-.

capement isreleasedby said releasin means, and means actuatedby-the numer keys' of mg several sets oftdigit wheels and separate machine frame for releasing such restraining means, controlling means zfor cooperating shaft holdingmeans.

5,'The combination with a typewriting machinehaving a-franie and a travelin car riage, oi a calculator, movable with sai -car-' ria'ge, having several separate digit wheels andseparate trainsof actuating gearing for each digit wheel, escapeme'nt; means nor-' restraining each train, means having mallly fixe relation to the typewriter frame for releasin such escapement means, a controller shaft mounted on the typewriter having a gear wheel in line with such releasing means, saidgear-wheel being in sliding engagement witha corresponding gear-wheel of each train of gearin means normally holding such controller s aft to prevent the rotation of any-train of gearing whose 'escapement is released by said releasing means means actuated by the numeral keys of the typewriter for releasing the controller shaft holding means, and means also actuated bv such keys for limiting theirotation of such controller shaft. 5 (ix-The combination withv a typewriting machine having a traveling carriage, of a calculator havin separate digit wheels and separate trains o actuating gearing for such digit wheels, means for'sliifti'ng such digit wheels so they may be actuated by diiierent gear-wheels of each .trainof caring accord- 111 as the calculator is set or addition or 'su' traction, controlling. means for cooperatin with each train of gearing, and means for re easing such controlling means-by the actu' ation of any numeral key of the typewriter.

7'. The combination with a typewriting macliine'having a traveling carriage, of a calculator, movable with said carriage, havtrainsv of actuating gearing for such digit wheels, escapement means for normally restraining each train of gearing, means for releasing such .escapement means, controlling means for engaging the'same gearing Whose escapement means is released, means for releasin suc'hcontrolling means by the actua tion 0%a numeralkey of the typewriter, and means for shiftin the digit wheels into engagementwith difi'er'ent. Wheels of the train of gearing, according as the calculator is being worked for addition or subtraction.

8. The combination with a typewritingo machine having a frame and-a traveling carriage, of a calculator movable witl said car- 120 riage,-actuating means for the calculator 1 carried. thereby; means for normally restraining such'actuating means, means fixedly Imounted relative; to the :typewritin'g with such calculator to permit the-operation trolling means, and means 'ae'tn'atedQby keys of the typewriter for releasing such locking means.

ble of beingworked for addition or subtrac-e tion, controlling means common to all the calculators and in operative relation to two of them at the same time, such controlling means being operablein one direction only with respect to each calculator, and means for causing such two calculators to operate simultaneouslyupon the actuation of a numeral'key of the typewriter,

11. The combination with a typewriting machine, of a plurality of calculators capable of beingflworked for addition or subtraction, controlling means common to all the calculators and in operative relation to two of them at the same time, such controlling means being operable in one direction only with respect to each calculator, and means for causing such two calculators to operate simultaneously upon the actuation of a numeral key of the t ewriter, one such calcu lator indicating adtFition and the other subtraction.

12. The combination with a typewriting machine, of a pluralit of calculators, a controller with which eac calculator is designed ,to successively operatively engage, such controller being operable in one direction only with respect to each calculator, means normally lockin leasing such locking means upon the actuation of a numeral key of the ty ewriter, and a separate calculator actuate simultaneously with each of the aforementioned calculators for indicating the sums total of their work. V

13. The combination with a t'ypewriting machine having a traveling carriage, of a plurality of calculators movable wlth such carriage, a controlling shaft having a gearwheel with which each calculator is designed to successively operatively engage, such controlling'shaft being operable in one direction only with respect to each calculator, means normally locking said shaft, means for releasing such locking means upon the actuation of a numeral key of the ty ewriter, and a separate calculator mova le with said 1plurality of calculators and actuated simu taneously with each of them for 0 said controller, means for re-' indicating the sums total of their work, said controller shaft being common to said separate calculator and having gear-wheels with which the latter successively operatively engages as each of said plurality of calculators successively engages the first mentioned gear-wheel of the controller shaft.

14. The, combination with a typewriting machine, of a series of three calculators,for working cross subtraction, the first for indicating the minuend, the second the subtrahend, and the third the remainder, a fourth calculator having shiftable digits for working both addition and subtraction, and means for simultaneously operating the fourth calculator and any one of the three calculators by the depression of any of the numeral keys of the typewriter, such means being movable in i keys of the typewriter for releasing such con'-' troller and limiting the movement thereof, and means having a fixed relation to said controller for releasing said restraining means. 1

16. The combination with atypewriter, of a calculator movable in relation thereto and having a series of digit wheels, separate trains of spring-actuated gearing for such digit wheels, a series or escapement devices for such trains of gearing, a stationary rod having a tripping device for releasing such escapement devices as they are moved across the plane thereof, a controlling shaft having a gear wheel with which one wheel of each train of gearing is designed to be brought into engagement, such gear wheel and tripping device being in the same vertical plane, means for normally holding said shaft, means for releasing such holding means as each numeral key of the ty writer is actuated, and means also actuated l Jy the depression of such keys for arresting the rotation of such shaft.

17. The combination with a typewriter, of a calculator movable in relation thereto and having a series of digit Wheels, separatetrains of spring-actuated gearing for such digit wheels, a series of escapement devices for such trains of gearing, a stationary rod having a tripping device for releasing such escapement devices as they are moved across key of the typewriter is actuated, a; series of gear-wheels on such shaft, one for each nuengagement, means in the same vertical plane with such gear-wheel for releasing the calculator mechanism, a series of gear-wheels on said shaft, segmentally toothed wheels for engaging said gear-wheels, having each-a stop tooth,spring-heldsupports for said toothed wheels, and means-actuated b e the several numeral keys for shifting sai supports to throw said segmentally toothed wheels into engagement with their respective gearwheels, said stop teeth limiting the rotation of. said controller shaft.

19. The combination with a typewriter, of

a calculator having a series of digit-con trolling wheels, and a separate train of springactuated gearing for each digit-controlling wheel, such digit controlling wheels being'designed/to engage either of twointermeshing wheels of each train of gearing, means for shifting such digitcontrolling wheels, a controller shaft for cooperating with each train of gearing, means for releasing the train of'gearing with which the controller shaft is in operative relation, and means actuated by the type-' writer keys for freeing such controller shaft andregulating the revolution thereof.

20. In a calculator, the combination with Y the several trains of gearing, of the digit-controlling wheels, the longitudinally-movable shaft therefor having an eccentric groove in one end, a stationary lug projecting into such groove, and a crank arm on the end of such shaft.

21 In a calculator, the comblnation with the series of digit-controlling wheels, separate trains of spring-actuated gearing for such digit-controlling wheels, and an escapement for each train-of gearing, of a series of 1 wheels actuated by the vdigit-controlling wheels and having cams for engaging the escapements of the adjacent trains of gearing, eachescapement having a laterally movable pawl for engaging and holding its respective train of gearlng, means for moving such pawls independently of the'escapements, and means for regulating the actuation of each train of gearing when the respective pawl thereof'isreleased. Y

' In testimony whereof, I have signed this specification in the presence of two subscribing Witnesses.

' ELMER V. WILLIAMS. Witnesses:

BERNARD MYERS, W. H. HYATT. 

